RN-Ex

Type RN-Ex

For the precise control of constant volume flows in potentially explosive atmospheres (ATEX)

Circular, mechanical self-powered volume flow controllers for the control of supply air or extract air in constant air volume systems, approved and certified for potentially explosive atmospheres (ATEX)

ATEX-compliant construction

Approved for gases, mists, vapours and dusts in zones 1, 2, 21 and 22

Volume flow rate can be set using an external scale, no tools required

No on-site test measurements required for commissioning

Suitable for airflow velocities of up to 12 m/s

Any installation orientation

Casing air leakage to EN 1751, class C

Optional equipment and accessories

Acoustic cladding for the reduction of case-radiated noise

Secondary silencer Type CA for the reduction of air-regenerated noise

CAV controllers Type RN-Ex

Tested to VDI 6022

Application

Description

Application

Circular EXCONTROL CAV controllers of Type RN-Ex for the precise supply air or extract air flow control in constant air volume systems

For use in potentially explosive atmospheres (ATEX)

Mechanical self-powered volume flow control without external power supply

Simplified project handling with orders based on nominal size

Special features

ATEX mark and certification

ATEX equipment group II, approved for zones 1, 2, 21 and 22

Volume flow rate can be set using an external scale; no tools required

The volume flow controller is a mechanical self-powered unit and works without external power supply. A damper blade with low-friction bearings is adjusted by aerodynamic forces such that the set volume flow rate is maintained within the differential pressure range.

The aerodynamic forces of the airflow create a closing torque on the damper blade. The bellows extends and increases this force while at the same time acting as an oscillation damper. The closing force is countered by a leaf spring that unrolls over a cam plate. The shape of the cam plate is such that a change in the differential pressure leads to an adjustment of the damper blade in a way that the volume flow rate is maintained almost exactly.

Efficient commissioning

The volume flow rate setpoint value can be set quickly and easily using the pointer on the external scale; no measurements are required.

The advantage over flow adjustment dampers is that there is no need for repeat measurements or adjustments by an air conditioning engineer. Should the system pressure change, e.g. by opening or closing of duct sections, the flow rates in the entire system will also change if flow adjustment dampers are used; however, this is not the case with mechanical self-powered volume flow controllers A mechanical self-powered controller reacts immediately and adjusts the damper blade such that the set constant volume flow rate is maintained.

Volume flow rate ranges

The minimum differential pressure of CAV controllers is an important factor in designing the ductwork and in rating the fan including speed control.

Sufficient duct pressure must be ensured for all operating conditions and for all control units. The measurement points for fan speed control must be selected accordingly.

Nominal sizes

80 – 400 mm

Volume flow rate range

11 – 1400 l/s or 40 – 5040 m³/h

Volume flow rate control range

Approx. 25 to 100 % of the nominal volume flow rate

Scale accuracy

± 4 %

Minimum differential pressure

50 Pa (nominal size 80: 100 Pa)

Maximum differential pressure

1000 Pa

Operating temperature

10 – 50 °C

Quick sizing tables provide a good overview of the room sound pressure levels that can be expected. Approximate intermediate values can be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design programme.

The first selection criteria for the nominal size are the actual volume flow rates Vmin and Vmax. The quick sizing tables are based on generally accepted attenuation levels. If the sound pressure level exceeds the required level, a larger air terminal unit and/or a silencer is required.

Variants, Dimensions and weight

Volume flow controller with acoustic cladding for constant air volume flow control

Spigot to make connections to the ducting

For rooms where the case-radiated noise of the unit is not sufficiently reduced by a false ceiling

The circular ducts for the room under consideration must have adequate acoustic insulation (provided by others) on the fan and room ends

Acoustic cladding cannot be retrofitted

Anbauteile: VARYCONTROL Regelkomponenten

☒

Regel- größe

Schnittstelle

Vmin -/ Vmax - Verstellung

Differenzdruck- transmitter

Stellantrieb

Fabrikat

Easyregler

Dynamisch

Easy

V

Integriert

Integriert

①

Compactregler

Dynamisch

BC0

V

MP-Bus

Integriert

Integriert

②

BF0

V

MP-Bus

Integriert

Integriert

②

BL0

V

LonWorks

Integriert

Integriert

②

BM0

V

Modbus

Integriert

Integriert

②

BM0-J6

V

Modbus und steckerfertiger Anschlussleitung

Integriert

Integriert

②

XG0

V

Integriert

Integriert

③

XB0

V

Integriert

Integriert

③

LN0

V

Integriert

Integriert

⑤

LK0

V

KNX

⑤

LY0

V

Integriert

Integriert

⑤

Compactregler

Statisch

SA0

V

Integriert

Integriert

④

SC0

Δp

Integriert

Schnelllaufender Stellantrieb integriert

④

Universalregler

Dynamisch

B11

V

Integriert

Stellantrieb, Drehmoment für TVT

②

B13

V

Integriert

Stellantrieb

②

B27

V

Integriert

Stellantrieb

②

B1B

V

Integriert

Federrücklaufantrieb

②

XC3

V

Integriert

Federrücklaufantrieb

③

Universalregler

Statisch

BP1

V

MP-Bus

Separates Bauteil

Stellantrieb, Drehmoment für TVT

②

BP3

V

MP-Bus

Separates Bauteil

Stellantrieb

②

BPB

V

MP-Bus

Separates Bauteil

Federrücklaufantrieb

②

BPG

V

MP-Bus

Separates Bauteil

Schnelllaufender Stellantrieb

②

BB1

V

Separates Bauteil

Stellantrieb, Drehmoment für TVT

②

BB3

V

Separates Bauteil

Stellantrieb

②

BBB

V

Separates Bauteil

Federrücklaufantrieb

②

XD1

V

Integriert

Stellantrieb

③

XD3

V

Integriert

Federrücklaufantrieb

③

BR1

Δp

MP-Bus

100 Pa

Stellantrieb, Drehmoment für TVT

②

BR3

Δp

MP-Bus

100 Pa

Stellantrieb

②

BRB

Δp

MP-Bus

100 Pa

Federrücklaufantrieb

②

BRG

Δp

MP-Bus

100 Pa

Schnelllaufender Stellantrieb

②

BS1

Δp

MP-Bus

600 Pa

Stellantrieb, Drehmoment für TVT

②

BS3

Δp

MP-Bus

600 Pa

Stellantrieb

②

BSB

Δp

MP-Bus

600 Pa

Federrücklaufantrieb

②

BSG

Δp

MP-Bus

600 Pa

Schnelllaufender Stellantrieb

②

BG1

Δp

100 Pa

Stellantrieb, Drehmoment für TVT

②

BG3

Δp

100 Pa

Stellantrieb

②

BGB

Δp

100 Pa

Federrücklaufantrieb

②

BH1

Δp

600 Pa

Stellantrieb, Drehmoment für TVT

②

BH3

Δp

600 Pa

Stellantrieb

②

BHB

Δp

600 Pa

Federrücklaufantrieb

②

XE1

Δp

Integriert, 100 Pa

Stellantrieb

③

XE3

Δp

Integriert, 100 Pa

Federrücklaufantrieb

③

XF1

Δp

Integriert, 600 Pa

Stellantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens

☒ Bestellschlüsseldetail, V Volumenstrom, Δp Differenzdruck

Anbauteile: VARYCONTROL Regelkomponenten

☒

Regel- größe

Schnittstelle

Vmin -/ Vmax - Verstellung

Differenzdruck- transmitter

Stellantrieb

Fabrikat

LVC

TVR

TVJ

TVT

TZ-S

TA-S

TVZ

TVA

TVM

TVRK

TVLK

Easyregler

Dynamisch

Easy

V

Integriert

Integriert

①

●

●

●

●

●

●

●

●

Compactregler

Dynamisch

BC0

V

MP-Bus

Integriert

Integriert

②

●

●

●

●

●

●

●

●

BF0

V

MP-Bus

Integriert

Integriert

②

●

BL0

V

LonWorks

Integriert

Integriert

②

●

●

●

●

●

●

●

BM0

V

Modbus

Integriert

Integriert

②

BM0-J6

V

Modbus und steckerfertiger Anschlussleitung

Integriert

Integriert

②

XG0

V

Integriert

Integriert

③

●

XB0

V

Integriert

Integriert

③

●

●

●

●

●

●

●

LN0

V

Integriert

Integriert

⑤

●

●

●

●

●

●

●

LK0

V

KNX

⑤

LY0

V

Integriert

Integriert

⑤

●

Compactregler

Statisch

SA0

V

Integriert

Integriert

④

SC0

Δp

Integriert

Schnelllaufender Stellantrieb integriert

④

Universalregler

Dynamisch

B11

V

Integriert

Stellantrieb, Drehmoment für TVT

②

●

B13

V

Integriert

Stellantrieb

②

●

●

●

●

●

●

B27

V

Integriert

Stellantrieb

②

●

B1B

V

Integriert

Federrücklaufantrieb

②

●

●

●

●

●

●

●

XC3

V

Integriert

Federrücklaufantrieb

③

●

●

●

●

●

●

●

Universalregler

Statisch

BP1

V

MP-Bus

Separates Bauteil

Stellantrieb, Drehmoment für TVT

②

●

BP3

V

MP-Bus

Separates Bauteil

Stellantrieb

②

●

●

●

●

●

●

●

●

BPB

V

MP-Bus

Separates Bauteil

Federrücklaufantrieb

②

●

●

●

●

●

●

●

●

BPG

V

MP-Bus

Separates Bauteil

Schnelllaufender Stellantrieb

②

●

●

●

●

●

●

●

●

●

BB1

V

Separates Bauteil

Stellantrieb, Drehmoment für TVT

②

●

BB3

V

Separates Bauteil

Stellantrieb

②

●

●

●

●

●

●

●

●

BBB

V

Separates Bauteil

Federrücklaufantrieb

②

●

●

●

●

●

●

●

XD1

V

Integriert

Stellantrieb

③

●

●

●

●

●

●

●

●

XD3

V

Integriert

Federrücklaufantrieb

③

●

●

●

●

●

●

●

●

BR1

Δp

MP-Bus

100 Pa

Stellantrieb, Drehmoment für TVT

②

●

BR3

Δp

MP-Bus

100 Pa

Stellantrieb

②

●

●

●

●

●

●

●

BRB

Δp

MP-Bus

100 Pa

Federrücklaufantrieb

②

●

●

●

●

●

●

●

●

BRG

Δp

MP-Bus

100 Pa

Schnelllaufender Stellantrieb

②

●

●

●

●

●

●

BS1

Δp

MP-Bus

600 Pa

Stellantrieb, Drehmoment für TVT

②

●

BS3

Δp

MP-Bus

600 Pa

Stellantrieb

②

●

●

●

●

BSB

Δp

MP-Bus

600 Pa

Federrücklaufantrieb

②

●

●

●

●

BSG

Δp

MP-Bus

600 Pa

Schnelllaufender Stellantrieb

②

●

●

●

●

BG1

Δp

100 Pa

Stellantrieb, Drehmoment für TVT

②

●

BG3

Δp

100 Pa

Stellantrieb

②

●

●

●

●

●

●

●

BGB

Δp

100 Pa

Federrücklaufantrieb

②

●

●

●

●

●

●

●

●

BH1

Δp

600 Pa

Stellantrieb, Drehmoment für TVT

②

●

BH3

Δp

600 Pa

Stellantrieb

②

●

●

●

BHB

Δp

600 Pa

Federrücklaufantrieb

②

●

●

●

●

XE1

Δp

Integriert, 100 Pa

Stellantrieb

③

●

●

●

●

●

●

●

●

XE3

Δp

Integriert, 100 Pa

Federrücklaufantrieb

③

●

●

●

●

●

●

●

●

XF1

Δp

Integriert, 600 Pa

Stellantrieb

③

●

●

●

●

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

●

●

●

●

① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens

☒ Bestellschlüsseldetail, V Volumenstrom, Δp Differenzdruck

Anbauteile: VARYCONTROL Regelkomponenten

☒

Regel- größe

Schnittstelle

Vmin -/ Vmax - Verstellung

Differenzdruck- transmitter

Stellantrieb

Fabrikat

Easylabregler

Statisch

Elab

RS, RE, PC, C

TCU3

Integriert

Schnelllaufender Stellantrieb

Elab

RS, PC, C

TCU3

Integriert

Schnelllaufender Stellantrieb

Elab

RE, PC, C

TCU3

Integriert

Schnelllaufender Stellantrieb

Elab

RS, RE, PC, FH, C

TCU3

Integriert

Schnelllaufender Stellantrieb

Elektronischer Regler

Statisch

Elektronischer Regler

TMA

RS, RE, PC

TCU-LON-II mit LonWorks-Schnittstelle

Integriert

Schnelllaufender Stellantrieb

TMB

RS, RE, PC

TCU-LON-II mit LonWorks-Schnittstelle

Integriert

Schnelllaufender Stellantrieb (bürstenloser Motor)

TMA

RS, RE,

TCU-LON-II mit LonWorks-Schnittstelle

Integriert

Schnelllaufender Stellantrieb

TMB

RS, RE,

TCU-LON-II mit LonWorks-Schnittstelle

Integriert

Schnelllaufender Stellantrieb (bürstenloser Motor)

TMA

RE ,PC

TCU-LON-II mit LonWorks-Schnittstelle

Integriert

Schnelllaufender Stellantrieb

TMB

RE ,PC

TCU-LON-II mit LonWorks-Schnittstelle

Integriert

Schnelllaufender Stellantrieb (bürstenloser Motor)

TMA

RS, RE ,PC, FH

TCU-LON-II mit LonWorks-Schnittstelle

Integriert

Schnelllaufender Stellantrieb

TMB

RS, RE ,PC, FH

TCU-LON-II mit LonWorks-Schnittstelle

Integriert

Schnelllaufender Stellantrieb (bürstenloser Motor)

XF3

Δp

Integriert, 600 Pa

Federrücklaufantrieb

③

BB3

V

Separates Bauteil

Stellantrieb

②

① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens

☒ Bestellschlüsseldetail, V Volumenstrom, Δp Differenzdruck

RN-Ex

Installation details, Basic information and nomenclature

Installation details

Basic information and nomenclature

Bend

A bend with a curvature radius of at least 1D – without an additional straight duct section upstream of the CAV controller – has only a negligible effect on the volume flow rate accuracy.

Installation and commissioning

Connections for equipotential bonding: Suitable cables must be connected by others

Any installation orientation

Volume flow rate can be set using an external scale; no tools required

No repeat measurements or adjustments by an air conditioning engineer are necessary

RN-Ex-D: For constructions with acoustic cladding, ducts on the room side should have cladding up to the acoustic cladding of the controller

Upstream conditions

The volume flow rate accuracy ΔV applies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulence that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN 1505. Some installation situations require straight duct sections upstream.

Free air intake only with a straight duct section of 1D upstream.

Space required for commissioning and maintenance

Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings.

Space required

Attachments

①

②

③

Attachments

mm

Without actuator

200

200

200

Definition of noise

① Air-regenerated noise
② Case-radiated noise

Prinipal dimensions

ØD [mm]

Outside diameter of the spigot

ØD₁ [mm]

Pitch circle diameter of flanges

ØD₂ [mm]

Outside diameter of flanges

ØD₄ [mm]

Inside diameter of the screw holes of flanges

L [mm]

Length of unit including connecting spigot

L₁ [mm]

Length of casing or acoustic cladding

B [mm]

Duct width

B₁ [mm]

Screw hole pitch of flange (horizontal)

B₂ [mm]

Outside dimension of flange (width)

B₃ [mm]

Width of device

H [mm]

Duct height

H₁ [mm]

Screw hole pitch of flange (vertical)

H₂ [mm]

Outside dimension of flange (height)

H₃ [mm]

Unit height

n [ ]

Number of flange screw holes

T [mm]

Flange thickness

m [kg]

Unit weight including the minimum required attachments for manual adjustment

Acoustic data

fm [Hz]

Octave band centre frequency

LPA [dB(A)]

A-weighted sound pressure level of air-regenerated noise of the VAV terminal unit, system attenuation taken into account

LPA1 [dB(A)]

A-weighted sound pressure level of air-regenerated noise of the VAV terminal unit with secondary silencer, system attenuation taken into account

LPA2 [dB(A)]

A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit, system attenuation taken into account

LPA3 [dB(A)]

A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit with acoustic cladding, system attenuation taken into account

All sound pressure levels are based on 20 μPa.

Volume flow rates

Vnom [m³/h] and [l/s]

Nominal volume flow rate (100 %)

The value depends on product type and nominal size

Values are published on the internet and in technical leaflets, and stored in the Easy Product Finder design software.

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